2013 Topps Doctor Who Alien Attax 50th Anniversary is a continuation of the easy-to-play trading card game. It's also the closest thing card collectors have to a traditional set of cards focusing on the updated version of the series. 2013 Topps Doctor Who Alien Attax 50th Anniversary has the franchise's first memorabilia cards as well. The entire collection includes base cards, Rainbow Foils, basic Foil cards, Companions, Timeless Moments and more. Although it lives up to its name by including five decades worth of Doctor Who characters, the primary focus is on the latest incarnations. Randomly inserted are Costume Cards with swatches of material embedded into the cards. The 50th Anniversary set can be combined with the first Doctor Who Alien Attax release.